Porous S, N co-doped carbon is facilely fabricated using wasted sweet potato vines as the single precursor.
The sample exhibits excellent ORR-catalytic activity, good stability, and a high methanol and CO tolerance compared to the commercial Pt/C catalyst.
The excellent ORR performance origins from porous nature, sufficient accessibility of ORR-catalytic sites, and heteroatom doping.
The transformation of sweet potato vines into ORR-active carbon materials provides double strategy for environmental and energy issue.